ESR study of interaction between hindered piperidine stabilizers and low molecular weight ketones, hydroperoxides and peroxides

摘要: Abstract An ESR study of the interaction two hindered piperidines: bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate (Tinuvin 770) and bis(1,2,2,6,6-pentamethyl-4-piperidinyl)sebacate 292) with diethylketone, benzophenone, tert-butylhydroperoxide di-tert-butylperoxide has been made. The results obtained show that aliphatic aromatic ketones accelerate rate formation piperidinoxy radicals from piperidines, whereas hydroperoxide peroxide decrease rate. Two different mechanisms for these interactions have proposed.